Getting Started with ASP.NET MVC Accordion Control

4 May 202212 minutes to read

This section briefly explains about how to include ASP.NET MVC Accordion control in your ASP.NET MVC application using Visual Studio.

Prerequisites

System requirements for ASP.NET MVC controls

Create ASP.NET MVC application with HTML helper

Install ASP.NET MVC package in the application

Syncfusion ASP.NET MVC controls are available in nuget.org. Refer to NuGet packages topic to learn more about installing NuGet packages in various OS environments. To add ASP.NET MVC controls in the application, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search for Syncfusion.EJ2.MVC5 and then install it.

The Syncfusion.EJ2.MVC5 NuGet package has dependencies, Newtonsoft.Json for JSON serialization and Syncfusion.Licensing for validating Syncfusion license key.

If you create ASP.NET MVC application with MVC4 package, search for Syncfusion.EJ2.MVC4 and then install it.

Add namespace

Add Syncfusion.EJ2 namespace reference in Web.config under Views folder.

<namespaces>
    <add namespace="Syncfusion.EJ2"/>
</namespaces>

Add style sheet

Checkout the Themes topic to learn different ways (CDN, NPM package, and CRG) to refer styles in ASP.NET MVC application, and to have the expected appearance for Syncfusion ASP.NET MVC controls. Here, the theme is referred using CDN inside the <head> of ~/Views/Shared/_Layout.cshtml file as follows,

<head>
    ...
    <!-- Syncfusion ASP.NET MVC controls styles -->
    <link rel="stylesheet" href="https://cdn.syncfusion.com/ej2/20.1.55/fluent.css" />
</head>

Add script reference

In this getting started walk-through, the required scripts are referred using CDN inside the <head> of ~/Views/Shared/_Layout.cshtml file as follows,

<head>
    ...
    <!-- Syncfusion ASP.NET MVC controls scripts -->
    <script src="https://cdn.syncfusion.com/ej2/20.1.55/dist/ej2.min.js"></script>
</head>

Register Syncfusion Script Manager

Open ~/Views/Shared/_Layout.cshtml page and register the script manager EJS().ScriptManager() at the end of <body> in the ASP.NET MVC application as follows.

<body>
...
    <!-- Syncfusion ASP.NET MVC Script Manager -->
    @Html.EJS().ScriptManager()
</body>

Add ASP.NET MVC Accordion control

Now, add the Syncfusion ASP.NET MVC Accordion control in ~/Home/Index.cshtml page.

@using Syncfusion.EJ2.Navigations;

@(Html.EJS().Accordion("defaultAccordion")
    .Items(new List<AccordionAccordionItem> {
        new AccordionAccordionItem { Header = "ASP.NET", Expanded = true, Content = "Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web services. ASP.NET pages execute on the server and generate markup such as HTML, WML, or XML that is sent to a desktop or mobile browser. ASP.NET pages use a compiled,event-driven programming model that improves performance and enables the separation of application logic and user interface." },
        new AccordionAccordionItem { Header = "ASP.NET MVC", Content = "The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model, the view, and the controller. The ASP.NET MVC framework provides an alternative to the ASP.NET Web Forms pattern for creating Web applications. The ASP.NET MVC framework is a lightweight, highly testable presentation framework that (as with Web Forms-based applications) is integrated with existing ASP.NET features, such as master pages and membership-based authentication." },
        new AccordionAccordionItem { Header = "JavaScript", Content = "JavaScript (JS) is an interpreted computer programming language.It was originally implemented as part of web browsers so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter the document content that was displayed.More recently, however, it has become common in both game development and the creation of desktop applications." }
    }).Render()
)

Press Ctrl+F5 (Windows) or +F5 (macOS) to run the app. Then, the Syncfusion ASP.NET MVC Accordion control will be rendered in the default web browser.

ASP.NET MVC Accordion Control

Render the Accordion using content template

You can bind any data in Accordion items, by simply using the content template property in ASP.NET Accordion. Accordion is already provided with the content template support and hence this support can be utilized to load the other HTML elements or as per your requirement.

In the below demo, the Accordion items are given with chart, grid, calender as their content using the content template.

@using Syncfusion.EJ2.Charts;
@using Syncfusion.EJ2.Navigations;
@model List<Accordion.Controllers.LineChartData>

<div>
    Content Template
</div>
@(Html.EJS().Accordion("defaultAccordion")
    .ContentTemplate(
        @<div class="e-accordion-container">
            <div>
                <div>
                    <div> Chart </div>
                </div>
                <div>
                    <div>
                        @(Html.EJS().Chart("container")
                            .Series(series => {
                                series.Type(ChartSeriesType.Line).Width(2).XName("xValue").Marker(mr=>mr.Visible(true).Width(10).Height(10)).YName("yValue").DataSource(Model).Name("Germany").Add();
                                series.Type(ChartSeriesType.Line).Width(2).XName("xValue").YName("yValue1").Marker(mr => mr.Visible(true).Width(10).Height(10)).DataSource(Model).Name("England").Add();
                            })
                            .Title("Inflation - Consumer Price")
                            .Render()
                        )
                    </div>
                </div>
            </div>
            <div>
                <div>
                    <div> Grid </div>
                </div>
                <div>
                    <div>
                        @(Html.EJS().Grid("ej2grid")
                            .Height("400px")
                            .DataSource(dataManger => {
                                dataManger.Url("https://services.odata.org/V4/Northwind/Northwind.svc/Products").CrossDomain(true).Adaptor("ODataV4Adaptor");
                            })
                            .Columns(col => {
                                col.Field("ProductID").HeaderText("Product ID").Width("120").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
                                col.Field("ProductName").HeaderText("Product Name").Width("150").Add();
                                col.Field("UnitPrice").HeaderText("Supplier ID").Width("130").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
                                col.Field("UnitsInStock").HeaderText("QuantityPerUnit").Width("120").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
                                col.Field("Discontinued").HeaderText("Discontinued").Width("140").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Center).Type("boolean").DisplayAsCheckBox(true).Add();
                            })
                            .AllowPaging()
                            .Render()
                        )
                    </div>
                </div>
            </div>
            <div>
                <div>
                    <div> Calendar </div>
                </div>
                <div>
                    <div>
                        @Html.EJS().Calendar("calnder").Render()
                    </div>
                </div>
            </div>
        </div>
    )
    .Render()
)
public ActionResult Index()
{
    List<LineChartData> chartData = new List<LineChartData>
    {
        new LineChartData { xValue = new DateTime(2005, 01, 01), yValue = 21, yValue1 = 28 },
        new LineChartData { xValue = new DateTime(2006, 01, 01), yValue = 24, yValue1 = 44 },
        new LineChartData { xValue = new DateTime(2007, 01, 01), yValue = 36, yValue1 = 48 },
        new LineChartData { xValue = new DateTime(2008, 01, 01), yValue = 38, yValue1 = 50 },
        new LineChartData { xValue = new DateTime(2009, 01, 01), yValue = 54, yValue1 = 66 },
        new LineChartData { xValue = new DateTime(2010, 01, 01), yValue = 57, yValue1 = 78 },
        new LineChartData { xValue = new DateTime(2011, 01, 01), yValue = 70, yValue1 = 84 },
    };
    return View(chartData);
}
....
....
public class LineChartData
{
    public DateTime xValue;
    public double yValue;
    public double yValue1;
}

ASP.NET MVC Accordion with Content Template

You can also render accordion without using ContentTemplate which can be referred here.

View Sample in GitHub.